Sprayer nozzle



D66 4, w51 F. c. LUNDBERG SPRAYER NOZZLE Filed Aug. 16, 1947 Paten-ted Ae. 4, 1951 SPRAYER NOZZLE Frank C. Lundberg, Chicago, Ill., assignor to `Illinois Stamping & Mfg. Co., Chicago, Ill., a corporation of Illinois Application August 16, 1947, Serial No. 768,994

11 Claims.

This invention relates to a foam spray gun for spraying a foamy cleaning compound upon articles which are to be cleaned and the invention relates more particularly to the sprayer nozzle for the gun.

One of the objects of this invention is to provide a sprayer nozzle that breaks down the cleaning compound into a light foam or froth which when discharged by air under pressure discharges in the foam of a spray.

Another object is to agitate the cleaning compound in the sprayer nozzle, whereby to produce the foam.

Another object is to provide a sprayer nozzle which may be readily attached to and detached from a spray gun head.

Another object is to provide a sprayer nozzle composed of a few parts and easily assembled.

Another object is to provide a sprayer nozzle that is highly elllcient, durable, simple and comparatively inexpensive.

With these and other objects and advantages in view this invention consists in the several novel features hereinafter fully set forth and more particularly defined in the appended claims.

The invention is clearly illustrated in the drawing accompanying this specification in which:

Fig. 1 is a central longitudinal section through a spray gun equipped with a sprayer nozzle embodying a simple form of the present invention, the reservoir of the spray gun being partly broken away;

Fig. 2 is a plan of the sprayer nozzle partly in section with the spray gun partly broken away; and

Fig. 3 is a perspective view of one of the foraminated discs which break down the cleaning compound into foam.

The views are upon an enlarged scale.

Referring to said drawing, the reference character 4 designates the spray gun as a whole; it is here shown in the form of a cylinder 5 open at one end, its other end being dome-shaped as shown at 6 and formed with a central opening 1. The open end of the cylinder is arranged to be attached to a flexible tubular connection 8 which may lead from the discharge side of a vacuum carpet cleaner or from any other suitable blower or fan (not shown).

A reservoir @for the cleaning compound is removably secured to the cylinder 5 as by a cap I0 rigidly secured to the cylinder as by welding it thereto or otherwise. The reservoir and cap are shown as formed with complemental screw threads II, I2, whereby the reservoir may be readily attached to. the cap orv detached therefrom. A gasket 9a is interposed between the cap I0 and edge of the reservoir to provide a leak proof joint between the cap and reservoir.

Leading up from a point adjacent the bottom of the reservoir is a discharge tube I3 which extends through the walls of the cap and cylinder and is secured to the cap as by welding it thereto. The upper end of the discharge tube is bent at right angles to itself as at I4 to lie in coaxial alignment with the opening 'l in the cylinder 5 with its discharge end terminating at a pointl adjacent the dome end of the cylinder.

A valve I5 controls the inlet to the discharge tube and said valve is connected to a stern I6 by a goose neck Il. The stem extends into the interior of the cylinder, through holes in the cap and cylinder and is formed with a threaded reduced end I8 upon which is secured a push button I9. The push button extends out through the upper part of the wall of the cylinder and a coiled spring 20 interposed between the push button and lower part of the wall of the cylinder functions to yieldably hold the valve I5 closed. A pilot pin 2| projects from the valve into the discharge tube. Registering holes 22 in the cap and wall of the cylinder admit air to the reservoir under pressure from the cylinder 5.

The sprayer nozzle indicated generally byy 23 comprises an open ended cylindrical shell 24.

having an enlarged end 25 in which are contained a disc 26 and a flanged head 21, held in the enlarged end 25 as by a driving t. Extendingv through axially aligned openings in the disc 26' and head 2l and secured thereto is a nipple 28,

which is in coaxial alignment with the opening 'I in the dome and extends into the cylinder 5 through the opening 1, with the part of the nipple within the cylinder surrounding the discharge end I4 of the discharge tube I3, there being an air passage 29 between the cylinder and nozzle, here shown as comprising an annular opening formed between the nipple and the discharge tubev through which air under pressure -may be discharged from the cylinder to and through the nozzle.

The end I 4 of the discharge tube I3 being in coaxial alignment with the opening l, coaxial alignment between the nipple 28 and tube end I4 is assured, thus providing the annular opening 29 between the tube end I4 and nipple 28.

Between its ends the nipple 28 is formed with an annular ilange 30 which bears against the dome end of the cylinder and between said flange and the head 2l is secured a spring clip 3| which is formed with two arms 32 that extend along the up with suitable dies to form a cup-like or flangedck discs. The anges 34a of the discs bear against the inner face of the shell andceach' flangef 34a 4` bears against the next adjacent disc 34 except the innermost one which bears against the disc 26.

The discharge end of the shell Mis :formed with an inturned flange 35 which retains the flanged,

discs 34 in the shell at the open end thereof;

In use the reservoir 9 is filled with a suitable liquid cleaning Vcompound and air under pressure isadmittedto the'cylinder and reservoir and discharges through the sprayer nozzle. By depressing the pushbutton I9, the valve l is unseated permitting the air under pressure in the reservoir to discharge the cleaning compound into the sprayer nozzle where it encounters the several lforaminatedl discs and is blown through the perforations thereof, is thereby agitated and broken down into a foam condition.V This is augmented by the air under pressure flowing through the nozzle. The discharging air reduces the Afoam to-aspray as it is being discharged from theanozzl'e to the article tov be cleaned. The article nis: then wiped off as is customary.

Any suitable liquid cleaning compound which canbebroken down into a foamy condition may bnsed, Thecompound may comprise a soapy solution or it may be composed of chemicals suchV lare used in the foam methodoi cleaning. spray gun Iequipped With the above described sprayer nozzle may be used to spray a cleaning cemponnd foamwupon upholstery, carpets!) rugs o .r any-,Other articles- Having thus described my invention, itis ob vious that various irnrnaterialmodications may bamedain the Samewithout deeartinsrom .the spirit Aof, my invention; hence, I do ,not wish lto be;,understo,od as .limiting myself to the exact form,` construction,` arrangement and combina-V tiongofparts hereinshown and ,describedv lor uses mentigned Whatl claimas new ,and desire to. secure by Letters Patent is:

1.` Inv-afnam spray'. gnn, the combination of akpneuniatic spray head, a sprayer nozzle shellA havinga nipple extending into and adjustably.

secured upon said head, a discharge tube having @discharge end in coaxial ,alignment with the. shellgand extendinginto ,the nipple, therey being. anaannular air inlet openingto the shell around the,.discharge tube and a. plurality of spaced foraminatedl discs secured; in said shell.

2. In a foam spray gun, the combinatienofl apneumatic spray head, a sprayer nozzlepshell removably secured and adjustably mounted,V upon said head,.- said sprayer nozzleishellj including anipple providing an air inlet from the head to the-shell through which air under pressure is forced through thesprayer nozzle shell, a discharge tube having. adischargeend in coaxial alignment with the nipple of the shell forming an annular opening, a pluralityk of spaced flanged foraminated discs secured in said shell, said nipple permitting adjustment of the spray head with respect to the end of the discharge tube.

3. The combination with a pneumatic spray head including a discharge nozzle adapted to be connected to a source of air under pressure and a reservoir for a cleaning compound carried by thee/head, of Vasprayer nozzle shell, a nipple secured to and extending from the shell into the spray head, a centrally apertured disc and a .centrally apertured head secured at one end in the shell with the nipple secured in the disc and head and a plurality of spaced foraminated discs secured in the shell between the centrally apertured-disc landtheuother end of the shell.

4. The .combination with a pneumatic spray head including a discharge nozzle adapted to be connected. to` a source of air under pressure and a, reservoir for a cleaning compound adapted to be carried by the head, of a sprayer nozzle shell formed with. an enlarged end, a nipple extending from the shellv into the discharge nozzle ofY the spray head, a centrally apertured disc anda centrally apertured head secured in the enlarged end of the shell with the nipple secured inthe Vdisc and headvand a plurality of spaced foraminated -discs secured in the shell between theacentrally apertured disc and the other end of; the `s111211- 5. As an article of manufacture, a foam sprayer nozzle adapted to be connectedto a discharge opening of Va discharge nozzle of a spraying device, said foam sprayer nozzle comprising a shell having anv enlargement at one end and an inturnedhnange at the other end, a disc and a flanged` head secured in the enlarged end of the shell, a vnipple secured in said disc land flanged headsaid nipple adapted to be mounted within the, discharge opening ofthe discharge nozzle andr a .plurality of spaced foraminated discs secured in said shell with one endmost disc bearing against said flanged end with the innermost onebearing against said first mentioned disc.

6.. A foam sprayer `nozzle adapted to be detachably mountedvon a discharge nozzle of a spraying device, said foam sprayer nozzle comprising a shell open. at both, ends, aucentrally apertured disc and a, centrally apertured anged head secured in oneend 'of the shell,y a nipple. secured in the apertured-flanged heady and disc and projectingl therefrom, aV plurality .of spaced flanged foraminated discs confined in said shell between the first. namedgdisc and` theother endof the shell, and. .w resilientmeans mounted on said foam sprayer nozzle and adapted to detachably mount said foam sprayer nozzle on said discharge nozzle.

'77.` A foam sprayer nozzle comprising a shell, a plurality of flanged foraminated discs secured in said shell with the flanges of the discs spacing thgrnapart, aflanged nipple secured to said shellgnd projecting from one end thereof and a-spring-,clip secured to said shellf by said nipple and, adapted tQadjusta-bly secure the nozzle upon ai 'Spray gll'nf 8.',In',a foam .spray gun adapted for spraying a. foam, the combination of n, pneumatic spray head adaptedto discharge a'stream of air under pressure and including a discharge nozzle formed with a discharge opening, a reservoir for a liquid. cleaning compound adapted to be placed under pressure, said spray head also including a discharge tube` extending from the reservoir into the. discharge nozzle Aand forming an air passage about the` end of the discharge tube contiguous tothe discharge opening oi the nozzle whereby theliquid `adaptedto be sprayed, and means comprising a series of foraminated, spaced discs for foaming the liquid discharged from the spray head by discharging the sprayed liquid and the stream of air, under pressure, through said air passage about the discharge tube and through the foraminated, spaced discs, whereby the foam produced from the liquid cleaning compound is adapted to be sprayed upon a surface to be cleaned.

9. A spray foam gun for either spraying a liquid or spraying a foamed liquid comprising a pneumatic spray head adapted to discharge a stream of air under pressure and including a discharge nozzle formed with a discharge opening, a reservoir for receiving liquid to be placed under pressure, said spray head also including a discharge tube extending from the reservoir into the discharge nozzle and forming an air passage about the end of the discharge tube contiguous to the discharge opening of the nozzle, and quickly detachable means comprising a series of foraminated, spaced discs for foaming the liquid discharged from the spray head by discharging the sprayed liquid and the stream of air, under pressure, through said air passage about the discharge tube and through the foraminated, spaced discs, whereby the spray foam gun is adapted for spraying a liquid with the means for foaming the liquid detached, and for spraying a foam with the means for foaming the liquid attached.

10. The combination with a spray gun adapted to discharge a stream of air under pressure and having a reservoir for receiving liquid to be placed under pressure, a spray head having a discharge opening, and a discharge tube extendv.ing from the reservoir contiguous to the opening in the spray head, of a spray nozzle attachment adapted for foaming the liquid, said attachment comprising a shell adapted to receive a plurality of foraminated, spaced discs for foaming the liquid discharged from the discharge tube, means adapted to be mounted within said discharge opening for discharging the stream of air, under pressure, within a reduced air discharge passage formed by said means about the discharge tube and through the foraminated, spaced discs, whereby foam is produced from the liquid discharged from the discharge tube, and complementally formed means for detachably mounting the spray nozzle on the spray gun contiguous to the discharge end of the discharge tube.

1l. As an article of manufacture, a foam spray nozzle attachment for a spray gun adapted to discharge a stream of air under pressure, and including a discharge nozzle formed with a discharge opening and comprising a reservoir for receiving liquid to be placed under pressure, said spray gun also including a discharge tube extending from the reservoir into the discharge nozzle opening and dening an air passage about the end of the discharge tube contiguous to the discharge opening of the nozzle, said attachment comprising a shell adapted to receive a plurality of foraminated, spaced disks for foaming the liquid discharged from the discharge tube, means adapted to be mounted Within said discharge opening of the nozzle for discharging the stream of air under pressure within a reduced air passage dened by said means about the discharge tube and through the foraminated, spaced disks, whereby foam is produced from the liquid discharged from the discharge tube, and complementally formed means for detachably mounting the spray nozzle on the spray gun contiguous to the discharge end of the discharge tube.

FRANK C. LUNDBERG.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS (Addition to No. 652,763) 

